I cannot belive! This is the second shot ever done in nature to
Chrysis immaculata Buysson!!!
Great. This is one of the most rare European species.
I don't know why, but it seems more common in the Netherlands (Linsenmaier, 1959 and pers. comm. based on material examined in collections).
You can recognize it by the red line along the posterior margin of the first tergite.
It is typical of this rare species.
Ciaoooo
Paolo